The majority of species (6,793) are Florideophyceae, and mostly consist of multicellular, marine algae, including many notable seaweeds. [5][6] Red algae are abundant in marine habitats. [7] . Approximately 5% of red algae species occur in freshwater environments, with greater concentrations in warmer areas. [8] .

red algae, (division Rhodophyta), any of about 6,000 species of predominantly marine algae, often found attached to other shore plants. Their morphological range includes filamentous, branched, feathered, and sheetlike thalli.

Jan 18, 2020 · Habitat and Distribution Red algae are found around the world, from polar waters to the tropics, and are commonly found in tide pools and in coral reefs.

Red algae, also called Rhodophyta, are a large group of eukaryotic organisms that can photosynthesis. Their red color results from the red pigments - phycobilins, which are absent in green algae.

Red algae are commonly found in coral reefs and tide pools. They have the ability to survive at a greater depth than other algae because the pigment Phycoerythrin absorbs the blue light that can penetrate deeper than any other light wave.

Jul 17, 2017 · Palo Alto, CA — The red algae called Porphyra and its ancestors have thrived for millions of years in the harsh habitat of the intertidal zone—exposed to fluctuating temperatures, high UV radiation, severe salt stress, and desiccation.

Red algae are abundant in marine habitats but relatively rare in freshwaters. Approximately 5% of red algae species occur in freshwater, environments with greater concentrations found in warmer areas.

Sep 25, 2024 · Freshwater species account for 5% of red algal diversity, but they also have a worldwide distribution in various habitats; they generally prefer clean, high-flow streams with clear waters and rocky bottoms, but with some exceptions. A few freshwater species are found in black waters with sandy bottoms and even fewer are found in more lentic waters.

Oct 7, 2024 · Rhodophyceae, commonly referred to as red algae, represents a significant and diverse group of aquatic organisms, encompassing approximately 831 genera and over 5,250 species. This group is characterized by its distinctive reddish hue, primarily due to the presence of the water-soluble pigment r-phycoerythrin.

Red algae are abundant in marine habitats but are relatively rare in freshwaters; in freshwaters, they usually inhabit lotic waterbodies. For example, Batrachospermum (Fig. 9.6C) is a red alga found in streams and springs throughout the world.